Phase frequency detector capable of improving noise characteristics
US7463100B2 · kind B2 · utility
3Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2006 |
| Grant date | Dec 9, 2008 |
| Priority date | — |
| Expiry date | Jan 17, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/18
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A phase frequency detector for improving in-band phase noise characteristics of a PLL is disclosed. The phase frequency detector compares a reference frequency with a division frequency created by dividing an output frequency of a voltage controlled oscillator (VCO) by a predetermined division ratio, creates a phase-difference signal corresponding to a phase difference between the reference frequency and the division frequency, and improves noise characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.